VarDeclaration have incorrect locations

```
/datum
    var/bar

/datum/proc/foo()
```

bar's location is incorrectly reported at what i assume is the next token, foo()

same for
```
datum_flags = NONE
```
it reports the location as the = not the var name

This will also apply across file boundaries, if the last token in a file is a var decl then it reports the location as the first token in the next file in the .dme